US8058461B2

Mono-indenyl transition metal compounds and polymerization therewith

Claim Score by NHIP

Read claim 1, the broadest

Abstract

This invention relates to transition metal compounds, catalyst systems comprising said compounds and polymerization processes using such catalyst systems, where the transition metal compound is represented by the formula: This invention also relates to process to produce such compounds.

US8058461B2, drawing sheet 1
Sheet 1 of 119

Term

Projected expiry 5 June 2030.

  1. Priority and filed
  2. Granted
  3. Today
  4. Projected expiry

20 claims: 1 independent, 19 dependent

  1. 1
    Broadest claimClaim Score 31, narrow(NHIP)A transition metal compound represented by the formula:where M is a group 3, 4, 5 or 6 metal;J is a group 15 or 16 atom, and when J is a group 15 metal, m is 1, indicating the presence of R′, and when J is a group 16 metal, m is zero, indicating the absence of R;G is a bridging group and n is 1, 2 or 3 indicating the number of atoms in the direct chain between the indenyl ring and the ligand J;R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are independently selected from a hydrogen, fluoro, hydrocarbyl, substituted hydrocarbyl, halocarbyl, substituted halocarbyl, silylcarbyl, substituted silylcarbyl, germylcarbyl, or substituted germylcarbyl radical, and two or more adjacent R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 can join together to form a cyclic group fused to the indenyl ring;R′ is selected from a hydrocarbyl, halohydrocarbyl, or substituted hydrocarbyl radical;X is a univalent ionic ligand, L is a Lewis base ligand and b is 0, 1 or 2 representing the presence (b=1 or 2) or absence (b=0) of L, provided that when n is 2, G is not O—SiR 2 , or R 4 Ph, and when n is 3, G is not SiR 2 (R 4 Ph), where Ph is phenyl and each R is as defined for R′.